42557456 has 10 divisors (see below), whose sum is σ = 82455102. Its totient is φ = 21278720.

The previous prime is 42557453. The next prime is 42557497. The reversal of 42557456 is 65475524.

It can be written as a sum of positive squares in only one way, i.e., 41165056 + 1392400 = 6416^2 + 1180^2 .

It is a super-2 number, since 2×42557456² = 3622274122383872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42557453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1329905 + ... + 1329936.

Almost surely, 2^42557456 is an apocalyptic number.

It is an amenable number.

42557456 is a deficient number, since it is larger than the sum of its proper divisors (39897646).

42557456 is a wasteful number, since it uses less digits than its factorization.

42557456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2659849 (or 2659843 counting only the distinct ones).

The product of its digits is 168000, while the sum is 38.

The square root of 42557456 is about 6523.6075908963. The cubic root of 42557456 is about 349.1337927050.

It can be divided in two parts, 4255 and 7456, that added together give a palindrome (11711).

The spelling of 42557456 in words is "forty-two million, five hundred fifty-seven thousand, four hundred fifty-six".